how to hand in your notice

Sure, I'd be glad to help. Remember, it's essential to leave on positive terms as much as possible. Firstly, you should have a private meeting with your boss to explain your decision.

That's a part you can't control. However, ensure you express that it's a personal decision that you've thought thoroughly about. It's not about the team or the management but your personal growth or whatever reason you have.

Exactly, after your discussion with your boss, write a formal resignation letter. Keep it simple and professional. No need to mention the specifics of your next opportunity if you're not comfortable. Once you've done that, continue to perform well until your notice period is complete. Leave your position with grace and professionalism.